Tobe used with Ryzom API/Item icon (Retrieves Item icons) It's the id of an item that you can find in the Character xml file.
For example, iczahp_3.sitem is a valid sheetid.
sheetids can me found in Nimetu's ryzom_extra repository

Usage

<base URL>/item_icon.php?sheetid=iczahp_3.sitem&c=1&q=0&s=0&sap=-1&destroyed=0&label=1&locked=0

Sheetids

Armor

sheetid	Description	Default icon
iczahp_3.sitem'	Armor pants
Example	Example	Example
Example	Example	Example

Weapon

sheetid	Description	Default icon
icfm2ms_3.sitem	Amps
Example	Example	Example
Example	Example	Example

Materials

sheetid	Description	Default icon
m0021dxapd01.sitem	Fiber
Example	Example	Example
Example	Example	Example

Mission Materials

sheetid	Description	Default icon
Example	Example	Example
Example	Example	Example
Example	Example	Example

Potions, Flowers and Other Rewards

sheetid	Description	Default icon
Example	Example	Example
Example	Example	Example
Example	Example	Example